hackberry blistergall psyllid Order HEMIPTERA Family Aphalaridae Genus Pachypsylla Species celtidisvesiculum Author Riley
poplar twig gall aphid Order HEMIPTERA Family Aphididae Genus Pemphigus Species populiramulorum Author Riley
poplar petiolegall aphid Order HEMIPTERA Family Aphididae Genus Pemphigus Species populitransversus Author Riley
pistol casebearer Order LEPIDOPTERA Family Coleophoridae Genus Coleophora Species malivorella Author Riley
minute egg parasite Order HYMENOPTERA Family Trichogrammatidae Genus Trichogramma Species minutum Author Riley
